Primality proof for n = 200606689:
<p>Take b = 2.
<p>b^(n-1) mod n = 1.
<p><a href=24019.html>24019 is prime.</a>
<br>b^((n-1)/24019)-1 mod n = 75811056, which is a unit, inverse 117800574.
<p>(24019) divides n-1.
<p>(24019)^2 > n.
<p>n is prime by Pocklington's theorem.